Rionegro, Colombia

Catholic University of the East

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Rionegro, Colombia

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Aguilar M.,Instituto Alexander von Humboldt | Sierra J.,Catholic University of the East | Ramirez W.,Instituto Alexander von Humboldt | Vargas O.,National University of Colombia | And 7 more authors.
Restoration Ecology | Year: 2015

At an historic moment, when Colombia is emerging from 60 years of armed conflict, the 7-year-old Colombian Network for Ecological Restoration (Red Colombiana de Restauración Ecológica [REDCRE]) has created four subnational nodes, and is actively developing several more. All of this is taking place in the context of the Ibero-American and Caribbean Society for Ecological Restoration (Sociedad Ibero-Americana y del Caribe de la Restauración Ecológica [SIACRE]). In mid-November 2014, over 200 representatives of government agencies, academia, private enterprises, and nongovernmental organizations (NGOs) from the entire country attended a symposium to launch the Antioquia Province node, and take stock and plan the way forward. There are bright prospects of transdisciplinary and public-private collaborations in Colombia for ecological restoration and restoration of natural capital as part of a strategy to transition smoothly to a post-conflict era. We suggest some goals and guidelines to help move forward an ambitious agenda to mainstream ecological restoration. © 2015 Society for Ecological Restoration.


Rios-Pulgarin M.I.,Catholic University of the East | Rios-Pulgarin M.I.,National University of Colombia | Barletta M.,Catholic University of the East | Barletta M.,Federal University of Pernambuco | Mancera-Rodriguez N.J.,National University of Colombia
Journal of Fish Biology | Year: 2016

The seasonal and interannual changes of the fish assemblage in the main channel and littoral zone of the Guarinó River, a torrential system located in the Colombian Andean foothills, were examined in relation to the physical and chemical environmental changes associated with the hydrological cycle and the El Niño–La Niña–Southern Oscillation (ENSO) between 2007 and 2010. Four samplings per year (in dry season and high water) were performed. Environmental variables (temperature, pH, conductivity, turbidity, oxygen, total nitrogen, orthophosphate, depth and flow rate) were contrasted with ANOVAs and a discriminant analysis to establish temporal patterns. Biological descriptors (richness, density and biomass) were contrasted with ANCOVAs. The temporal patterns of the taxonomic and functional composition and the density of the fish assemblages were examined with respect to environmental variables through canonical discriminant analysis per habitat. Interannual differences were significant with regard to density and richness for the main channel habitat; while in the littoral zone, the differences were significant between both the year and seasons. Discriminant analysis showed variations in species composition and relative abundance between the main channel and the littoral zone under contrasting hydrological conditions of El Niño–La Niña. High flows from 2008 to 2009 (La Niña) favoured resident species (e.g. Creagrutus magdalenae) and small benthic Siluriformes (e.g. Chaetostoma spp.), but was limited to migratory species (e.g. Prochilodus magdalenae). From 2009 to 2010 (El Niño), the most common species were reduced and rare species increased. River flow, temperature and oxygen were the variables that had the largest influences on the seasonal and interannual differences in the fish assemblage structure of the Guarinó River. The results suggested that the presence and abundance of species and functional groups in different habitats were regulated by stochastic conditions, such as droughts, floods and drag events associated with the Southern Oscillation phenomenon (ENSO), acting as a hydrological disturbance on the habitats and generating different responses according to the adaptive characteristics of the species. © 2015 The Fisheries Society of the British Isles


Rios-Pulgarin M.I.,Catholic University of the East | Barletta M.,Federal University of Pernambuco | Mancera-Rodriguez N.J.,National University of Colombia
Journal of Fish Biology | Year: 2015

The seasonal and interannual changes of the fish assemblage in the main channel and littoral zone of the Guarinó River, a torrential system located in the Colombian Andean foothills, were examined in relation to the physical and chemical environmental changes associated with the hydrological cycle and the El Niño-La Niña-Southern Oscillation (ENSO) between 2007 and 2010. Four samplings per year (in dry season and high water) were performed. Environmental variables (temperature, pH, conductivity, turbidity, oxygen, total nitrogen, orthophosphate, depth and flow rate) were contrasted with ANOVAs and a discriminant analysis to establish temporal patterns. Biological descriptors (richness, density and biomass) were contrasted with ANCOVAs. The temporal patterns of the taxonomic and functional composition and the density of the fish assemblages were examined with respect to environmental variables through canonical discriminant analysis per habitat. Interannual differences were significant with regard to density and richness for the main channel habitat; while in the littoral zone, the differences were significant between both the year and seasons. Discriminant analysis showed variations in species composition and relative abundance between the main channel and the littoral zone under contrasting hydrological conditions of El Niño-La Niña. High flows from 2008 to 2009 (La Niña) favoured resident species (e.g. Creagrutus magdalenae) and small benthic Siluriformes (e.g. Chaetostoma spp.), but was limited to migratory species (e.g. Prochilodus magdalenae). From 2009 to 2010 (El Niño), the most common species were reduced and rare species increased. River flow, temperature and oxygen were the variables that had the largest influences on the seasonal and interannual differences in the fish assemblage structure of the Guarinó River. The results suggested that the presence and abundance of species and functional groups in different habitats were regulated by stochastic conditions, such as droughts, floods and drag events associated with the Southern Oscillation phenomenon (ENSO), acting as a hydrological disturbance on the habitats and generating different responses according to the adaptive characteristics of the species. © 2015 The Fisheries Society of the British Isles.


PubMed | University of the Atlantic, Catholic University of the East, National University of Colombia, Fundacion Verdes Horizontes and 3 more.
Type: Journal Article | Journal: Journal of fish biology | Year: 2016

The remarkable fish diversity in the Caribbean rivers of north-western South America evolved under the influences of the dramatic environmental changes of neogene northern South America, including the Quechua Orogeny and Pleistocene climate oscillations. Although this region is not the richest in South America, endemism is very high. Fish assemblage structure is unique to each of the four aquatic systems identified (rivers, streams, floodplain lakes and reservoirs) and community dynamics are highly synchronized with the mono-modal or bi-modal flooding pulse of the rainy seasons. The highly seasonal multispecies fishery is based on migratory species. Freshwater fish conservation is a challenge for Colombian environmental institutions because the Caribbean trans-Andean basins are the focus of the economic development of Colombian society, so management measures must be directed to protect aquatic habitat and their connectivity. These two management strategies are the only way for helping fish species conservation and sustainable fisheries.


PubMed | CNRS Systematics, Biodiversity and Evolution Institute, National University of Colombia, Montpellier University, Catholic University of the East and 7 more.
Type: Journal Article | Journal: Molecular ecology | Year: 2016

Understanding why species richness peaks along the Andes is a fundamental question in the study of Neotropical biodiversity. Several biogeographic and diversification scenarios have been proposed in the literature, but there is confusion about the processes underlying each scenario, and assessing their relative contribution is not straightforward. Here, we propose to refine these scenarios into a framework which evaluates four evolutionary mechanisms: higher speciation rate in the Andes, lower extinction rates in the Andes, older colonization times and higher colonization rates of the Andes from adjacent areas. We apply this framework to a species-rich subtribe of Neotropical butterflies whose diversity peaks in the Andes, the Godyridina (Nymphalidae: Ithomiini). We generated a time-calibrated phylogeny of the Godyridina and fitted time-dependent diversification models. Using trait-dependent diversification models and ancestral state reconstruction methods we then compared different biogeographic scenarios. We found strong evidence that the rates of colonization into the Andes were higher than the other way round. Those colonizations and the subsequent local diversification at equal rates in the Andes and in non-Andean regions mechanically increased the species richness of Andean regions compared to that of non-Andean regions (species-attractor hypothesis). We also found support for increasing speciation rates associated with Andean lineages. Our work highlights the importance of the Andean slopes in repeatedly attracting non-Andean lineages, most likely as a result of the diversity of habitats and/or host plants. Applying this analytical framework to other clades will bring important insights into the evolutionary mechanisms underlying the most species-rich biodiversity hotspot on the planet.


Jaramillo-Villa U.,Catholic University of the East | Jaramillo-Villa U.,University of Antioquia | Jaramillo-Villa U.,Institute Investigacion Of Recursosbiologicos | Maldonado-Ocampo J.A.,Federal University of Rio de Janeiro | And 2 more authors.
Journal of Fish Biology | Year: 2010

This study documents differences in fish assemblages for 32 freshwater streams located between 258 and 2242 m a.s.l. on the eastern slopes of the central range of the Colombian Andes. A total of 2049 fishes belonging to 62 species, 34 genera and 16 families were collected. Species richness declined rapidly with altitude; nearly 90% of the species were recorded between 250 and 1250 m a.s.l. Three of the four physico-chemical variables, of the water, temperature, dissolved oxygen and pH, explained 53·5% of the variation in species richness along the altitudinal gradient, with temperature the most important (37·6%). An analysis of species composition showed that the distinctiveness of the fish fauna increased with elevation, with the greatest turnover observed between 1000 and 1750 m a.s.l. On this altitudinal gradient, turnover was dominated by the loss of species rather than gain, and dominance by just a few species was greater at higher elevations. Turnover was also observed along the altitudinal gradient in the structure of the three functional groups (torrential, pool and pelagic species). The study focused on understanding the pattern of diversity of fish communities inhabiting the Andes in Colombia. Anthropogenic effects on the altitudinal distribution of fish species in the region, however, are largely unknown and would require further investigations. © 2010 The Authors. Journal compilation © 2010 The Fisheries Society of the British Isles.


In this study, the physicochemical, probiotic and antioxidant properties in time, of yogurt prepared with Colombian berry syrup (Vaccinium meridionale Swartz) at two concentrations (15 and 20% of fruit).The physicochemical changes experienced by the product during storage were the pH decrease, increasing acidity values and decreased sucrose concentration. The results of the probiotic stability for all samples revealed that the concentration of 106 CFU/mL is stable for the first 16 days of storage as recommended by the standards for the description of probiotic products. The results of antioxidant activity, of total phenols content and of anthocyanins, revealed an increase of these between the first 8 and 12 days of storage and after that a decline of these characteristics. It is concluded that the product can be considered as a nutraceutical food.


Quijano-Abril M.A.,Catholic University of the East | Mejia-Franco F.G.,University of Antioquia | Callejas-Posada R.,University of Antioquia
Revista Mexicana de Biodiversidad | Year: 2014

We performed a panbiogeographic analysis of the species of Piper that belong to the clade Enckea, aiming to establish a primary biogeographic homology hypothesis among Seasonal Dry Neotropical Forest (SDNF) areas of the Antilles, Central, and South America. We used 904 distribution records of 74 species to generate 50 individual tracks, 8 generalized tracks, and 4 nodes, which were located in different SDNF formations. The track analysis did not integrate the SDNF under a common origin hypothesis. Instead, the results are congruent with different tectonic events independently influencing diversification of plants and animals. The events that may explain the current distribution of species of Enckea include the rising of Sierra Madre Occidental and Sierra Madre del Sur, the stablishment of the Motagua-Polochic fault system, the rising of Cordillera de Talamanca, Panama's Isthmus, and the fragmentation of Panamazon by Northern Andean orogeny.


PubMed | Catholic University of the East and National University of Colombia
Type: Journal Article | Journal: Journal of fish biology | Year: 2016

The seasonal and interannual changes of the fish assemblage in the main channel and littoral zone of the Guarin River, a torrential system located in the Colombian Andean foothills, were examined in relation to the physical and chemical environmental changes associated with the hydrological cycle and the El Nio-La Nia-Southern Oscillation (ENSO) between 2007 and 2010. Four samplings per year (in dry season and high water) were performed. Environmental variables (temperature, pH, conductivity, turbidity, oxygen, total nitrogen, orthophosphate, depth and flow rate) were contrasted with ANOVAs and a discriminant analysis to establish temporal patterns. Biological descriptors (richness, density and biomass) were contrasted with ANCOVAs. The temporal patterns of the taxonomic and functional composition and the density of the fish assemblages were examined with respect to environmental variables through canonical discriminant analysis per habitat. Interannual differences were significant with regard to density and richness for the main channel habitat; while in the littoral zone, the differences were significant between both the year and seasons. Discriminant analysis showed variations in species composition and relative abundance between the main channel and the littoral zone under contrasting hydrological conditions of El Nio-La Nia. High flows from 2008 to 2009 (La Nia) favoured resident species (e.g. Creagrutus magdalenae) and small benthic Siluriformes (e.g. Chaetostoma spp.), but was limited to migratory species (e.g. Prochilodus magdalenae). From 2009 to 2010 (El Nio), the most common species were reduced and rare species increased. River flow, temperature and oxygen were the variables that had the largest influences on the seasonal and interannual differences in the fish assemblage structure of the Guarin River. The results suggested that the presence and abundance of species and functional groups in different habitats were regulated by stochastic conditions, such as droughts, floods and drag events associated with the Southern Oscillation phenomenon (ENSO), acting as a hydrological disturbance on the habitats and generating different responses according to the adaptive characteristics of the species.


PubMed | Catholic University of the East and National University of Colombia
Type: Journal Article | Journal: Journal of fish biology | Year: 2016

The seasonal and interannual changes in the fish, macroinvertebrates and phycoperiphyton assemblages of the Guarin River were examined in relation to the physical and chemical environmental changes associated with the hydrological cycle and the El Nio-Nia/Southern Oscillation (ENSO) between 2007 and 2010. Four samplings (in dry and rainy seasons) were performed per year. Environmental variables (temperature, pH, conductivity, turbidity, oxygen, total nitrogen, orthophosphate, depth and flow rate) were measured. The temporal patterns of the taxonomic compositions for the three assemblages and the functional composition of fish and macroinvertebrate assemblages with respect to environmental variables were examined through canonical discriminant analysis, multidimensional scaling and multiple correlations. The presence and abundance of fishes, macroinvertebrates and algae species were regulated by environmental variables associated with extreme hydrological events, which derived from the natural torrential regimen of the basin and larger-scale phenomena, such as El Nio and La Nia. Fish abundance and richness were significantly correlated with algal density and pH, the macroinvertebrate density was negatively related to the flow rate and the richness was positively correlated with algal density. The algae richness was positively correlated with pH and negatively correlated with the flow rate and nitrogen. The algal density was positively correlated with pH and temperature and negatively correlated with river flow. The phycoperiphyton assemblage exhibited more direct responses in its density and richness to the hydrological changes (r(2) = 0743 and 0800, respectively). In functional terms, the El Nio phenomenon was defined by a greater abundance of omnivorous and insectivorous fishes, as well as filter feeders, scrapers and macroinvertebrate predators. During La Nia, a greater abundance of benthic fishes (both detritivorous and insectivorous) and shredder and collector-gatherer macroinvertebrates was observed. Differentiated responses recorded in the community were based on adaptive strategies for the local hydrological regime that enable fast recovery under conditions such as ENSO phenomena. Composition changes according to adaptations to different hydrological scenarios and the predominance of generalists trophic guilds and species with plasticity in their habits and their ranges of environmental tolerance were found, supporting the habitat templet model.

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